class Settings():
    def __init__(self):
        # 屏幕大小 背景色
        self.screen_width = 600
        self.screen_height = 400
        self.bg_color = (230, 230, 230)
        # 飞船速度
        self.ship_speed_factor = 1.5
        # 子弹大小 速度
        self.bullet_speed_factor = 1
        self.bullet_width = 3
        self.bullet_height = 15
        self.bullet_color = 60, 60, 60
        self.bullet_allowed = 3
